Modern Monetary Theory is the new thing among progressives. But it's been tried by many others, including the Roman dictators who ruined the Roman economy and had Rome falling apart before the barbarian invasions.

Among themselves, libertarians often see important dividing lines among various factions in terms of social views and lifestyles. But most on the outside define libertarianism as being overwhelmingly for one thing: excessive and "dogmatic" devotion to free markets.